No Answer-Back

DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM: No Answer-Back
- No Answer-Back

DESCRIPTION

In some cases, wireless door lock control functions are normal but the hazard warning lights and/or wireless door lock buzzer answer-back function(s) do not operate. In such cases, the main body ECU hazard warning lights and/or wireless door lock buzzer signal outputs may be malfunctioning.

NOTICE:
Troubleshooting should be started after confirming that the answer-back function has been set to ON.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK WIRELESS DOOR LOCK CONTROL FUNCTION

(a) Check the wireless door lock control functions by operating the transmitter switch.

Result:





C -- GO TO PROBLEM SYMPTOMS TABLE Problem Symptoms Table

B -- PERFORM ACTIVE TEST USING TECHSTREAM (WIRELESS DOOR LOCK BUZZER)
A -- Continue to next step.

2. CHECK HAZARD WARNING LIGHT

(a) Check that the hazard warning lights flash continuously when the hazard warning signal switch is pressed.

OK:

Hazard warning lights flash continuously.

NG -- GO TO LIGHTING SYSTEM How To Proceed With Troubleshooting
OK -- Continue to next step.

3. PERFORM ACTIVE TEST USING TECHSTREAM (FLASHER RELAY)

(a) Enter Active Test using the Techstream to generate a control command, and then check that the hazard warning lights flash.

Main Body ECU





OK:

Hazard warning lights are turned ON/OFF.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU

4. PERFORM ACTIVE TEST USING TECHSTREAM (WIRELESS DOOR LOCK BUZZER)

(a) Enter Active Test using the Techstream to generate a control command, and then check that the wireless buzzer operates normally.

Main Body ECU





OK:

Wireless buzzer turns ON/OFF.

NG -- INSPECT WIRELESS DOOR LOCK BUZZER

OK -- REPLACE MAIN BODY ECU

5. INSPECT WIRELESS DOOR LOCK BUZZER





(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NOTICE:
* The buzzer circuit is built into the main body ECU, not into the buzzer itself.
* When battery voltage is directly applied to the buzzer, the buzzer does not sound.

NG -- REPLACE WIRELESS DOOR LOCK BUZZER Removal
OK -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - MAIN BODY ECU AND BODY GROUND)





(a) Disconnect the A30 wireless door lock buzzer connector.

(b) Disconnect the E63 main body ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU